CVE-2021-36980

medium

Published — · Modified —

CVSS v3

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CVSS v2

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VIR risk

5.5

Description

Open vSwitch (aka openvswitch) 2.11.0 through 2.15.0 has a use-after-free in decode_NXAST_RAW_ENCAP (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-36980

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-36980.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202107-40

OS impact

OS	Version	Status	Fixed in
arch		fixed	`2.15.1-1`
sles		affected
debian	bookworm	fixed	`2.15.0+ds1-10`
debian	bullseye	fixed	`2.15.0+ds1-2+deb11u1`
debian	forky	fixed	`2.15.0+ds1-10`
debian	sid	fixed	`2.15.0+ds1-10`
debian	trixie	fixed	`2.15.0+ds1-10`

References

https://security.archlinux.org/ASA-202107-40
https://www.suse.com/security/cve/CVE-2021-36980.html
https://security-tracker.debian.org/tracker/CVE-2021-36980

Verify integrity in audit chain (admin only). AS-IS.